How can I email students registered for a particular topic list?

The link to send an email can be found in the operations menu for the selected topic list and for the specific topic.

1 Link to send email.

A person with the "s_studium" access right can also select a group of students by selecting "Students enrolled in the topic list" in bulk in the application:

The Information system Office for Studies Batch selection

Batch selection selects students who have teacher approval or are enrolled in a topic where approval is not required.

Another option is to use the filter in the Teacher's Notebook (the "change filter" link in the header of the page) and only send to students who are:

enrolled in the topics of course topic list to be selected ,
enrolled in any topic to be selected of the course-unrelated topic list.

If a student is unenrolled from a topic, he/she is automatically informed of this fact by e-mail (if the study for which he/she was unenrolled is still active).